🌐 Mailman 3 October 2014 - Tutor - python.org

Scripting Calligra sheets with Python
by Jim Byrnes Jan. 31, 2022

Jan. 31, 2022

I am trying to script Calligra Sheets (formerly KSpread) with python. I have gotten some of the included example scripts to run so I know python scripting is running. I found the following snippet on their website: import KSpread sheet = KSpread.view().sheet() # swap text of B5 and C6 t1 = sheet.text("B5") t2 = sheet.text(6,3) sheet.setText("B5", t2) sheet.setText(6, 3, t1) # swap value of D7 and E8 v1 = sheet.value("D7") v2 = sheet.value(8,5) sheet.setValue("D7", v2) sheet.setValue(8, 5, v1) Error: 'str' object has no attribute 'text' File "file:///usr/share/kde4/apps/sheets/scripts/extensions/myswap.py", line 4, in <module> This error message appeared in a dialog box. I've taught myself some Python but I don't understand what is happening here. Shouldn't t1 be a sheet object? What would cause it to be a str instead? Thanks, Jim

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Desktop Notifications on Linux
by Dharmit Shah June 29, 2017

June 29, 2017

Hi all, I am trying to create a script that will go through the /var/log/secure file on a Linux system and provide desktop notifications for failed login attempts. Here is the code - http://pastebin.com/MXP8Yd91 And here's notification.py - http://pastebin.com/BhsSTP6H I am facing issue in the function "new_attempts_from_last". I am not able to raise a desktop notification from this function. It always fails with this traceback - http://pastebin.com/cgHMScv3 I see this error only when I try to raise a notification from the aforementioned function. If I run test examples under /usr/share/doc/notify-python/examples, it works just fine. Also, if I try to raise a notification from under if __name__ == "__main__":, it works without any issues. So I don't think there's any issue with OS's notification daemon. Running from python shell like below also works fine: In [1]: import notification In [2]: notification.notification("Hey") What am I missing or doing wrong here? If it matters, I am running Fedora 20, python 2.7 and Cinnamon desktop environment. For readability purposes, I have provided pastebin links. Let me know if this is not the correct way. Regards, Dharmit.

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Option on How to create web Interface
by fabu desay March 9, 2016

March 9, 2016

If I got the problem correctly,you can equally create + open a file file = open(filename,+wr) The file should have the HTML extension You can now pace your web contents in the file.html you created that should work by trigering the python file you programed in and it inturn creates the website or pages of your choice an example like this could help webpage = open('index.html', 'w+') webpage.write("<html><head><title>My web page</title></head>"); webpage.write("<body>This the body</body></html>"); webpage.close()

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HELP I need help with Python Setup or to reach Marilyn Davis
by carolynn fryer July 12, 2015

July 12, 2015

I am at the point where I am just spinning my wheels. I tried to get help with logging on but so far I am just getting frustrated. I have a problem that I brought up the first night in class but couldn't seem to get help then. Sorry if I am at the point where I am totally frustrated and I need HELP. PLEASE. I did not turn in homework because of the fact that I can not run anything without getting a syntax error. I tried setting up a path for python environment variables and a few other things but I am getting no where. Can you give me some suggestions why I can't run anything. I have windows 7 on my home computer, and windows 8 on my laptop and they are both doing the same thing. So it has to be something I am doing or not doing. I really do not like being behind/late in anything so that is making me even more frustrated. I suppose I am even more frustrated and afraid to ask because I kink of got a slap in the face last time I took a course here and the instructor would not help. But that was a way different situation, I simply could not understand his English and then he told me he did not have any patience. Excuse me but I just about died when he, an INSTRUCTOR told me that. I worked at Stanford for 25 years and to hear an instructor say those words was unthinkable. Anyway you can maybe understand my reluctance to ask for help but I need help. Any suggestions?? When I use one of the computers at school everything works just fine. Except I can not get my own computer to log on when I am there. So again that is why I said it is my system and something in my set up that I don't have. Sorry for the long note, I was just letting out a little frustration. LOL Thx for any suggestions, Carolynn Fryer ps: I know this is not the proper way to get ahold of you but I could not find nor have time to find any other way. The UCSC system is not very user friendly

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Wave module
by Alex Krycek Feb. 12, 2015

Feb. 12, 2015

Hello, I'm trying to join two .wav files with the wave module. But when I try to use wave.open(filename, "rb") I receive the following error: Traceback (most recent call last): File "<stdin>", line 1, in <module> File "F:\PortablePython1.0\lib\wave.py", line 483, in open return Wave_read(f) File "F:\PortablePython1.0\lib\wave.py", line 162, in __init__ self.initfp(f) File "F:\PortablePython1.0\lib\wave.py", line 143, in initfp self._read_fmt_chunk(chunk) File "F:\PortablePython1.0\lib\wave.py", line 264, in _read_fmt_chunk raise Error, 'unknown format: %r' % (wFormatTag,) wave.Error: unknown format: 85 I read somewhere that there are various wave formats, only some supported by Python. Is this true? If so, is there any way I can convert my wave files into a supported kind? Thanks!

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Fwd: Re: Simple guessing game - need help with the math
by Greg Markham Nov. 4, 2014

Nov. 4, 2014

My apologies, this reply didn't make its way to the list. > > On Aug 13, 2014 1:25 AM, "diliup gabadamudalige" <diliupg(a)gmail.com> wrote: > > > > Wouldn't it be easier to work it this way? > > for example: > > number range =100 > > your selection = 82 > > > > round 1 > > computer guesses 50 > > you say higher > > then in round 2 the computer makes a guess only between 51 and 100 > > computer guesses 92 > > you say lower > > round 3 computer guesses between 51 and 91 > > round 4 computer guesses 75 > > you say higher > > now guess is between 76 and 91 > > etc. till the correct answer is reached > > you can use the random and range to select a random number between two numbers > > Interesting. I hadn't thought of that. And, it appears that would circumvent the issue I'm running into with rounding. I will try that approach; thank-you. > > But my curiosity is still begging me for an answer regarding my original approach. Is there a way to manage the functionality of be round function such that it does not strip any data to the right of the decimal point? > > Thanks, > > Greg > > > > > > > > > On Wed, Aug 13, 2014 at 4:55 AM, Greg Markham <greg.markham(a)gmail.com> wrote: > >> > >> Hello again, > >> > >> I'm working on one of the more advanced (at this stage of my learning process), albeit optional, assignments. The objective is to write a program that tries to guess your number from 1 to 100. After each guess, you tell it if it's (h)igher, (l)ower or (c)orrect, and eventually it'll logically zero in on the correct value. In addition, it should count the number of tries required to come to the correct guess. > >> > >> I've worked through a few hiccups so far, but I've come to a standstill. Here follows my code: > >> > >> import os > >> > >> print ("\nShall we play a game?\n\n") > >> print ("Think of a number, 1 to 100, and I will attempt to guess what it is.\n") > >> > >> input("Press [Enter] when ready.\n") > >> > >> guess = 50 > >> change = 50 > >> answer = "" > >> tries = 1 > >> > >> while answer == "h" or "l" or "c": > >> print ("My guess is: ", guess, "\n") > >> answer = input("Is it (H)igher? (L)ower? Or am I (C)orrect? ") > >> answer = answer.lower() > >> if answer == "h": > >> guess = round(int(guess + (change/2))) > >> change = change/2 > >> tries += 1 > >> elif answer == "l": > >> guess = round(int(guess - (guess/2))) > >> tries += 1 > >> elif answer == "c": > >> print ("/n/nYay! I win. Shall we play again?\n\n") > >> os.system('cls' if os.name == 'nt' else 'clear') > >> else: > >> print ("Invalid response. Please try again.\n") > >> > >> > >> Something about the math in the code here isn't quite right. If you were to enter "h" (for 'higher') each time, it would first guess 50, then 75, then 87, then 93, then 96, and finally would stop progressing at the number 97. I suspect it's a side-effect of the way the round function works, but I don't know how to get around it. > >> > >> Any help would be greatly appreciated. > >> > >> Thanks in advance, > >> > >> Greg > >> > >> _______________________________________________ > >> Tutor maillist - Tutor(a)python.org > >> To unsubscribe or change subscription options: > >> https://mail.python.org/mailman/listinfo/tutor > >> > > > > > > > > -- > > Diliup Gabadamudalige > > > > http://www.diliupg.com > > http://soft.diliupg.com/ > > > > ********************************************************************************************** > > This e-mail is confidential. It may also be legally privileged. If you are not the intended recipient or have received it in error, please delete it and all copies from your system and notify the sender immediately by return e-mail. Any unauthorized reading, reproducing, printing or further dissemination of this e-mail or its contents is strictly prohibited and may be unlawful. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. The sender does not accept liability for any errors or omissions. > > ********************************************************************************************** > >

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Newbie Trouble Processing SRT Strings In Text File
by Matt Varner Nov. 4, 2014

Nov. 4, 2014

TL:DR - Skip to "My Script: "subtrans.py" <beg> Optional Links to (perhaps) Helpful Images: 1. The SRT download button: http://i70.photobucket.com/albums/i82/RavingNoah/Python%20Help/tutor1_zps08… 2. A visual comparison of my current problem (see 'Desire Versus Reality' below): http://i70.photobucket.com/albums/i82/RavingNoah/Python%20Help/newline_prob… ============ The SRT File ============ The SRT file that you can download for every lesson that has a video contains the caption transcript data and is organized according to text snippets with some connecting time data. ======================================== Reading the SRT File and Outputting Something Useful ======================================== There may be a hundred different ways to read one of these file types. The reliable method I chose was to use a handy editor for the purpose called Aegisub. It will open the SRT file and let me immediately export a version of it, without the time data (which I don't need...yet). The result of the export is a plain-text file containing each string snippet and a newline character. ========================== Dealing with the Text File ========================== One of these text files can be anywhere between 130 to 500 lines or longer, depending (obviously) on the length of its attendant video. For my purposes, as a springboard for extending my own notes for each module, I need to concatenate each string with an acceptable format. My desire for this is to interject spaces where I need them and kill all the newline characters so that I get just one big lump of properly spaced paragraph text. From here, I can divide up the paragraphs how I see fit and I'm golden... ============================== My first Python script: Issues ============================== I did my due diligence. I have read the tutorial at www.python.org. I went to my local library and have a copy of "Python Programming for the Absolute Beginner, 3rd Edition by Michael Dawson." I started collecting what seemed like logical little bits here and there from examples found using Uncle Google, but none of the examples anywhere were close enough, contextually, to be automatically picked up by my dense 'noobiosity.' For instance, when discussing string methods...almost all operations taught to beginners are done on strings generated "on the fly," directly inputted into IDLE, but not on strings that are contained in an external file. There are other examples for file operations, but none of them involved doing string operations afterward. After many errors about not being able to directly edit strings in a file object, I finally figured out that lists are used to read and store strings kept in a file like the one I'm sourcing from...so I tried using that. Then I spent hours unsuccessfully trying to call strings using index numbers from the list object (I guess I'm dense). Anyhow, I put together my little snippets and have been banging my head against the wall for a couple of days now. After many frustrating attempts, I have NEARLY produced what I'm looking to achieve in my test file. ================ Example - Source ================ My Test file contains just twelve lines of a much larger (but no more complex) file that is typical for the SRT subtitle caption file, of which I expect to have to process a hundred...or hundreds, depending on how many there are in all of the courses I plan to take (coincidentally, there is one on Python) Line 01: # Exported by Aegisub 3.2.1 Line 02: [Deep Dive] Line 03: [CSS Values & Units Numeric and Textual Data Types with Guil Hernandez] Line 04: In this video, we'll go over the Line 05: common numeric and textual values Line 06: that CSS properties can accept. Line 07: Let's get started. Line 08: So, here we have a simple HTML page Line 09: containing a div and a paragraph Line 10: element nested inside. Line 11: It's linked to a style sheet named style.css Line 12: and this is where we'll be creating our new CSS rules. ======================== My Script: "subtrans.py" ======================== # Open the target file, create file object f = open('tmp.txt', 'r') # Create an output file to write the changed strings to o = open('result.txt', 'w') # Create a list object that holds all the strings in the file object lns = f.readlines() # Close the source file you no longer # need now that you have your strings f.close() # Import sys to get at stdout (standard output) - "print" results will be written to file import sys # Associate stdout with the output file sys.stdout = o # Try to print strings to output file using loopback variable (line) and the list object for line in lns: if ".\n" in line: a = line.replace('.\n','. ') print(a.strip('\n')) else: b = line.strip('\n') print(b + " ") # Close your output file o.close() ================= Desire Versus Reality ================= The source file contains a series of strings with newline characters directly following whatever the last character in the snippet...with absolutely no whitespace. This is a problem for me if I want to concatentate it back together into paragraph text to use as the jumping off point for my additional notes. I've been literally taking four hours to type explicitly the dialogue from the videos I've been watching...and I know this is going to save me a lot of time and get me interacting with the lessons faster and more efficiently. However... My script succeeds in processing the source file and adding the right amount of spaces for each line, the rule being "two spaces added following a period, and one space added following a string with no period in it (technically, a period/newline pairing (which was the only way I could figure out not target the period in 'example.css' or 'version 2.3.2'. But, even though it successfully kills these additional newlines that seem to form in the list-making process...I end up with basically a non-concatenated file of strings...with the right spaces I need, but not one big chunk of text, like I expect using the s.strip('\n') functionality. ============================================================ What I'm Holding Out For - This is what my output should look like (for the test file) ============================================================ # Exported by Aegisub 3.2.1 [Deep Dive] [CSS Values & Units Numeric and Textual Data Types with Guil Hernandez] In this video, we'll go over the common numeric and textual values that CSS properties can accept. Let's get started. So, here we have a simple HTML page containing a div and a paragraph element nested inside. It's linked to a style sheet named style.css and this is where we'll be creating our new CSS rules. =========================== Thank You For Your Time and Efforts! =========================== </beg>

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Practicing with sockets
by Bo Morris Oct. 31, 2014

Oct. 31, 2014

Hello all, hope everyone is doing well. I have been practicing with sockets and I am trying to send a small png from the client to the server. the client code is... import socket f = open('/Users/Bo/Desktop/logo_ONEConnxt.png', 'rb') strf = f.read() client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) client_socket.connect(("ip.ip.ip.ip", 8999)) client_socket.sendall(strf) f.close() exit() and the server code is... import socket f = open('img.png', 'wb') s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) port = 8999 s.bind(('', port)) s.listen(5) client_socket, address = s.accept() data = client_socket.recv(4029) f.write(data) client_socket.close() Both the above client and server code runs without error, however the "img.png" file that is placed on the server shows zero bytes? Will someone please show me what I am doing wrong? Thank you, Bo

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passing named arguments through command line
by Robert Sokolewicz Oct. 31, 2014

Oct. 31, 2014

I have a function with optional arguments x, y and I would like to pass y or z using a named variable through the command line. Inside a python script main(y=3) would work, but I have trouble passing y=3 as an argument in command line. I have tried the following: ---- import sys def main(x=1, y=2): print x print y if __name__ == '__main__': main(*sys.argv[1:]) ----- from my terminal I get: $ python script.py 1 2 $ python script.py y=3 y=3 2 whereas I would like the following to happen: $ python script.py y=3 1 3 Is this doable in any convenient way? thanks in advance! -Robert

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Would somebody kindly...
by Clayton Kirkwood Oct. 31, 2014

Oct. 31, 2014

Explain this double speak(>: [pair for pair in values if key == pair[0]] I understand the 'for pair in values'. I assume the first 'pair' creates the namespace (although I am not sure how Python knows it's a tuple yet). I think the outer [] make the line a comprehension ( If so, I don't seem to get how/why a comprehension works), and probably make the line either a tuple or list. The comprehension seems to act as a subroutine or macro( yes I know those two words are meaningless in Python). I definitely am missing the full meaning of the if statement. The example comes courtesy of Alan. Thanks, Clayton

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